Farage did not give advice to Trump.
Farage did not endorse Trump.
What he very cleverly has done, yet again, is raise his profile this time to the US. I suspect he is heading for the after dinner speech circuit as he is extremely eloquent and is not PC. This will have helped him in spades.
Trump will have gained by having a well spoken Politician who has shown it is possible to break the Establishment speaking at one of his venues. Again a clever move as more free publicity.
Mickey, your mob should take a look at how these to work and take a leaf out of their book. I'm not talking policies here just the presentation.